CPC Subgroup
F15B 21/04 Special measures taken in connection with the properties of the fluid
Full Title
Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass > Special measures taken in connection with the properties of the fluid
6 direct subcodes
Child Classifications
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- F15B 21/041 Removal or measurement of solid or liquid contamination, e.g. filtering
- F15B 21/042 Controlling the temperature of the fluid
- F15B 21/044 Removal or measurement of undissolved gas, e.g. de-aeration, venting or bleeding
- F15B 21/045 Compensating for variations in viscosity or temperature
- F15B 21/047 Preventing foaming, churning or cavitation
- F15B 21/048 Arrangements for compressed air preparation, e.g. comprising air driers, air condensers, filters, lubricators or pressure regulators
Top Applicants
Top 10 applicants by patent filingsfor class F15, 2013–2023, worldwide · Source: EPO PATSTAT
- ROBERT BOSCH DE 1,281
- SMC CORPORATION JP 865
- HITACHI CONSTRUCTION MACHINERY COMPANY JP 814
- KYB CORPORATION JP 584
- SCHAEFFLER TECHNOLOGIES & COMPANY DE 536
- CATERPILLAR US 532
- FESTO & COMPANY DE 486
- JOHN DEERE US 419
- KAWASAKI HEAVY IND JP 368
- HAMILTON SUNDSTRAND US 368